초록 ▼

A processor system and method are provided for providing motor excitation frequency control in a vehicle propelled by AC electric traction motors. The processor system and method allow for computing an excitation frequency signal based on a sum of i) a signal indicative of a weighted average of an e

A processor system and method are provided for providing motor excitation frequency control in a vehicle propelled by AC electric traction motors. The processor system and method allow for computing an excitation frequency signal based on a sum of i) a signal indicative of a weighted average of an estimated rotor speed signal and a measured vehicle speed signal and ii) a compensated slip command signal. Effective wheel slip control is thus provided without requiring sensors for measuring rotational speed of the traction motors.

대표청구항 ▼

[ What is claimed is:] [1.] A processor system for providing motor excitation frequency control in a vehicle having wheels propelled by AC electric traction motors respectively energized by one or more motor drives, the system comprising:a processor module comprising a first processor submodule for

[ What is claimed is:] [1.] A processor system for providing motor excitation frequency control in a vehicle having wheels propelled by AC electric traction motors respectively energized by one or more motor drives, the system comprising:a processor module comprising a first processor submodule for computing an excitation frequency signal respectively supplied to the one or more motor drives, the excitation frequency signal based on a sum of i) a signal indicative of a weighted average of an estimated rotor speed signal and a measured vehicle speed signal, and ii) a compensated slip command signal, the processor module further comprising a second processor submodule for computing an estimated slip signal based on respective measured motor current signals and the excitation frequency signal; anda slip compensation module coupled to receive a slip command signal and further coupled to the processor module to supply the compensated slip command signal, the slip compensation module comprising a submodule for computing a slip compensation signal based on the estimated slip signal and the slip command signal.